Unit Description (18-0015) AM-48 Test Set
0015-S033-20
Switches 3 and 14 control the speaker/earphone monitoring point.
See Figure 9-1 for a block diagram showing the interaction of these
switches. When Switch 3 is set to <DAMP>, the monitor point is
after the auto-range amplifier which significantly increases the
speaker level. This is particularly useful for audibly monitoring the
residual noise in notched noise and S/N Ratio measurements.
3.9 Hand-Held Printer
The AM-47 Hand-Held Printer is designed to be used exclusively
with the AM-48 to produce a hard copy of measurements and setups.
Table 3-3 lists technical specifications, Figures 3-8 and 3-9 provide
component locations, Figure 6-3 shows the connectors, and ¶7.39
contains the operating instructions.
Connectors . The connectors are used with the AC Adapter (70-0029)
and the Printer Cable (48-0079) as shown in Figure 6-3. The AC
Adapter is supplied with the AM-48, and the 48-0079 Printer Cable is
supplied with the AM-47 Hand-Held Printer. The input is a special
serial ASCII current loop compatible with the AM-48.
Power . Power is provided by an internal NiCad battery pack. When
the printer is connected, power to the AM-48 comes from the printer
battery pack, prolonging the life of the AM-48 batteries. There is an
internal recharging circuit in the printer that operates when the AC
Adapter is plugged in.
Power Switch . The slide switch to the left of the connectors is for
POWER ON/OFF.
LEDs . The LEDs light as described below:
1. The POWER LED lights continuously when the AC Adapter is
connected and the battery pack is charging (starts charge cycle
each time power is turned ON).
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